﻿//  Copyright 2020 Google Inc. All Rights Reserved.
//
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//
//  http://www.apache.org/licenses/LICENSE-2.0
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.

using System;
using System.Runtime.InteropServices;

namespace NtCoreLib.Win32.Security.Interop;

[StructLayout(LayoutKind.Sequential)]
internal struct SecPkgContext_KeyInfo : IDisposable
{
    public IntPtr sSignatureAlgorithmName;
    public IntPtr sEncryptAlgorithmName;
    public int KeySize;
    public int SignatureAlgorithm;
    public int EncryptAlgorithm;

    void IDisposable.Dispose()
    {
        SecurityNativeMethods.FreeContextBuffer(sSignatureAlgorithmName);
        SecurityNativeMethods.FreeContextBuffer(sEncryptAlgorithmName);
    }

    private static string ReadString(IntPtr ptr)
    {
        return ptr == IntPtr.Zero ? string.Empty : Marshal.PtrToStringUni(ptr);
    }

    public string SignatureAlgorithmName => ReadString(sSignatureAlgorithmName);

    public string EncryptAlgorithmName => ReadString(sEncryptAlgorithmName);
}
